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Native fish overlooked as invaders in U.S. waters

In the U.S. Geological Survey's Non-Indigenous Aquatic Species database, these so-called 'native transplant' fish are almost twice as common as fish introduced from outside the country. But a new review says native transplant fish, especially those that don't qualify as game fish, are rarely studied and their impacts poorly understood.

The importance of light for grassland plant diversity

Plants need light to grow. However, due to excess nutrients and/or the absence of herbivores less light can reach lower vegetation layers in grasslands. Consequently, few fast-growing species dominate and plant diversity declines. So far, this relationship has been established indirectly through experiments, but never directly by means of experimentally...

Invasive plant species are increasing exponentially, but no one knows how many invasive plant species there are

Invasive plants can have devastating effects on local ecologies, comparable to the effects wrought by global warming. And yet, there is currently no reliable understanding of how many invasive plant species there are in the world. New research comprehensively pinpoints the various unknowns that need to be addressed in order...